Incandescent-lamp hanger.



R. D. H. ANDERSON. INGANDESGENT LAMP HANGER.

APPLICATION FILED MAR. 26, 1910.

Patented Nev. 4, 1913.

2 SHEETSSHEET 1.

R. D. H. ANDERSON. INGANDESGENT LAMP HANGER.

APPLICATION FILED MAR.ZG,1910.

Patented Nov. 4, 1913.

2 SHEETS-SHEET 2.

SHUGYHTOZ witness UNITED STATES PATENT OFFICE. I

ROBERT D. H. ANDERSON, 0F CINCINNATI, OHIO, ASSIGNOR 0F ONE-HALF T0 WALTER R. ROCKHOLD, OF CINCINNATI, OHIO.

INCANDESCENT-LAMP HANGER.

Specification of Letters Patent.

Patented Nora 1,1913.

Application filed March 26, 1910. Serial No. 551,667.

To all whom it may concern:

Be it known that I, ROBERT D. H. ANDER- -sox-, a citizen of the United States of Amerinvented a certain new and useful Improvement in Incandescent-Lamp Hangers, of which the following is a Specification.

This invention relates to incandescent electric-lamp holders and particularly to thoseof the type adapted for use in supporting a lamp at the desired angle to suit the position of the work in the process of the manufacture of goods or for any other use to which such a lamp could be put to the best advantage for the convenience of the person or operator.

The object. of the invention is to provide simple and effective means for producing the above-noted result, the details of such means being hereinafter fully described and particularly pointed out in the claims.

In the accompanying several 'sheetsof drawings, forminga part of this specification, Figure 1 is an elevation of my invention, showing, in dotted-lines, the lamp extended from the holder perpendicularly, the said lamp and its clamp being further shown in projected dotted-lines (to the right) to indicate how the lamp can be swung or turned half-way around horizontally and, also, how the said lamp can be swung or turned to bring it to a horizontal position at a right-angle to the vertical one; Fig. 2, a detail elevation of the? improved disk angling-joint device at the top of the holder, shown at right-angles to that seen in Fig. 1 and with the lower member of the angling device shown in dotted-lines to the right and left at forty-five degree angles; Fig. 3,-

- an internal plan of one of the disk-members of the several forming a part of each of the two swivel-joints seen in Figs. 1 and 2, but on a somewhat larger scale; Fig. 1, a transverse central section of one of the swiveljoints seen in Figs. 1 and 2, but on the same scale as that seen in Fig. 3; Fig. 5, a crosssection of the connected disk-members of adjacent pairs used in the angular-joint at the top of the device; Fig. 6, a vertical section showing the lower end of the holder-tube, including its cap and the internal telescopicrod for sliding-extension and support of the lamp and. also, including the peculiar form of spiral friction or torsional clench used on said rod to sustain it within said tube at the desired longitudinal point; Fig. 7, a plan view of the preferred form of clamp used for-securing the lamp in detachable position 'to the lower elbowed or angled end of said rod; Fig. 8, a perspective viewof one jawmember of a modified form of said lamp-.

clamp; Fig. 9, a perspective view of the companion jaw-member of the said lampclamp seen in Fig. 8, and Fig. 10, a detail fragmentary portion of said rod showing the spiral friction or clench thereon.

In these views, 1 indicates a tube, 2 a rod telescopically-sliding within said tube and 3 a cap having screw-threaded engagement with the lower or outer end of said tube.

The rod 2 engages a central opening in the cap 3 and is provided with a head or flanged upper end ,4. A short tube or sleeve 5 surrounds the upper end of the rod 2 beneath the head 4 and a washer 6 is placed on said rod beneath the sleeve 5 and contacts with the lower or outer end of the tube 1, all as best seen in Fig. 6.

A clinging spiral or elastic wire 7- is wound upon the rod 2 within the'chamber 8 between the cap 3 and the washer 6. This spiral 7 has clenching or torsional engagement with the rod 2 and thereby forms a friction within the chamber 8 for supporting and sustaining said rod 2 at any desired longitudinal point within the tube 1 and is an important feature of m invention herein, both for its cheapness and efliciency without danger of displacement or being easily broken. i

The lower or outer end of the rod 2 is preferably bent at a right-angle to form the arm 9 for the attachment of the lamp 10, Clampingq'aws intervene between the arm 9 and the lamp 10 and are made up of a pair of members 11 and 12. Said clamping-jaws 11 and 12 are preferably made as shown in Figs. 1 and 7, wherein they are shown as forking froma two-part arm or extension 13 and have spaced outer ends 14, 14, the latter being held together by a swinging link or ring 15 when the clamp is in engagement over the socket of the lamp. The ring notch construction of closure for the jaws is a very convenient one and, also, a very effective one. The two-part arm or extension 13 forms a shank for the clamping-jaws and is adapted for engagement over the arm 9 at the outer end of the rod 2, a bolt or screw 17 being used to sccurethe clamp in the desired position on said arm 9 whereby the lamp may be held at any angle around said arm 5). The rod 2 being adapted to be rotated within the tube 1, the lamp at the lower end of the rod can thereby be further turned around throughout the circle of which the rod is the axial center. Thus a practically universal joint'is provided on the said rod itself and is an important feature herein.

The modified form of clamping-jaws seen in Figs. 8 and 9 is composed of two inde pendent corresponding members 11 and 12, but the two-part arm or extension 13 and the clamp-arms 14 are omitted, the said 'extension 13 being replaced by a pair of arms 11 and 12 on the jaw-members '11 and 12, respectively, each of such arms 11 and 12 having corresponding pendent semi-circular extensions 11 and 12, respectively, the extensions 11 and 12 being adapted for engagement over the angled-arm 9 at the outer end of the rod 2 and a suitable bolt or screw used, with its shank passing through the smooth bore of an opening '12 made in the part 12 of jaw-member 12 and engaging the threaded opening 11 in the part 11 of ]awmember 11. Said last-named screw (not shown) holds the jaw-members 11 and 12 firmly in place on the angled-arm 9 when set in the desired position for use and it can be readily released in order to reset the clamping-jaws for arranging the lamp supported thereby at the desired angle around said angled-arm 9. The jaw-members 11 and 12 of Fig. 6 are somewhat resilient, while those of Figs. 8 and 9 are not, the resilience of the former being provided for in the use of the ring 15 in the closure thereof over the lamp-socket.

The lamp is provided with a conductorcord 10 of a length to suit the telescopic sliding-extension of the rod 2 within the tube 1 and the slack in said conductor-cord is taken up by a spiral-spring 10", as best seen in Fig. 1, such spiral-spring having a,

hook 10 at its lower end, over which hook the cordengages, and the tendency of the said spring, in its expansive and contractive actions, being to operate automatically in the said ,take-up of the slack and letting out such slack in the lamp-cord. This lamp-cord take-up device is also another important feature herein.

A series of pairs of disk-members are attached to the top or upper end of the tube 1, each pair being composed of circular disks 18 and 19 pivotally-held together at the center by a transverse bolt 20. The members 18 and 19 of adjacent pairs of disks are arranged at right-angles to each other and integrally-connected together by means of an angular ligament 21, as best seen in Figs. 1 and 2, the other companion-members of the pairs of disks being independent ones and removable from place so that the interior of the pairs of disks are accessible for the purpose of placing lubricant in a somewhat plastic or congealed form in the chamber 22 provided by the circular internal grooves and dishings or depressions made in the said disks, as best seen in Fig. 4. The said grooves and depressions allow for an outer edge of sufficient width to furnish the required frictional-contact between the disks, and the centers do not touch each other so that the desired elasticity is effected in the disks and there is no possible impingement of the two .inner faces of the disks at the centers thereof whatever, thereby presenting the maximum of friction for the least amount of central bearing-surface. A turntable or flange 23 is provided on the diskmember 18 of the upper pair and a bolt or screw 24 is used to attach it in place on the supporting-bar 25 or other object from which the lamp is to be suspended. It is obvious that more than two companion pairs of the disk-members can be provided if desired, but the two pairs of disk-members set at right-angles to each other as shown will furnish the required angling scope to which the lamp is to be ordinarily put in use.

I claim 1. In an incandescent electric-lamp holder, a tube, a rod telescopically sliding within said tube and having a flanged head at its inner end, a sleeve on the rod beneath said flange within the tube, a washer on the rod below said sleeve, an orificed screw-threaded cap attached at the lower end of said tube and a wire spiral wound on said rod within the tube between said washer and the cap and adapted to present a clinging friction device to sustain said rod within the tube at the desired point of extension.

2. In an incandescent electric-lamp holder, a tube, a rod telescopically sliding within said tube and having an inner head, a sleeve within said tube beneath said headed rod. a washer on the rod, an orificed cap fitting the outer end of said tube. an angled-arm at the lower outer end of said rod," a spring-jawed clamp having a two-part clamp engaging said angled-arm on the rod, a bolt or screw for holding said spring-jawed clamp at the desired angle on said angled-arm and a link or ring variably-engaging the closing ends of said spring clamping-jaws over the shank of a lamp.

3. Tn an incandescent electric-lamp holder, a tube, a rod telescopically-sliding within Said tube and having a flanged head at its inner end, a sleeve on the rod beneath said flanged head, an orificed friction-spiral on said rod, a cap fitting the outer end of said tube and through which said rod passes, a

pair of clamping-jaws at the outer end of said rod, an electric-lamp supported in said clamping-jaws, an electric conductor-cord leading from said lamp to the source of current supply, a spiral-spring freely mounted on said tube with one .end thereof attached to said tube and the other end thereof provided with a hook over which said lampcord engages and such spring forming a take-up device for the lamp-cord in its automatic expanding and contracting actions thereby providing for the slack in the lampcord. 4. An incandescent electric lamp holder comprising a tube, a lamp-rod adapted to telescopically-reciprocate within said tube, a pair of hinge-disks each having flat, con tactmg, inner marglnal faces and from one of which said tube extends and the other one of which has an inner, central, orificed boss that is suitably spaced away from the inner face of the companion disk and, also, has a lubricant-holding groove or recess surrounding the said boss, and the first-named of which disks has a centrally-orificed countersunk inner face, and a central bolt connecting said disks in such a manner that the coinciding countersunk portions of both disks are duly alined and spaced from each other and said central boss of one disk spaced away from the inner face of the other disk, and the said flat-faced marginal edges frictionally-held in resilient-contact for supporting the. electric lamp at the desired angle.

ROBERT 'D. H. ANDERSON.

Witnesses JOHN ELIAS Jonas, 'LAURA E. SHIELDS. 

